Just curious when legacy damage came into the game? Because this old content would be fun to start farming solo again!
I want to say that it was added with WoD. I would like it to be able to solo some things on some of my less geared alts but I can wait.
Warlords of Dreanor was the first expansion that introduced a stat squish. In order to make old raids playable, they gave players up to Cata an insane damage buff, which you may refer to as “legacy damage”.
Legion officially introduced the “legacy raid” system which they are still using in retail.
Mists of Pandaria did not have any old raid changes. It was just your raw numbers against old bosses.